In order to study the drawability of AA5754 aluminum alloy blank, the numerical predictions of fracture failure behavior caused by cup drawing of metal sheet were carried out by using the GTN model and the thermodynamic-based continuous damage mechanics (CDM) model. The CDM model coupling the nonlinear isotropic and kinematic hardening laws with the isotropic ductile damage model was developed to carry out the numerical computation in the form of the user material subroutines. Although the forming limit curves predicted by GTN model and CDM model are distinctly different, but both of them are feasible to characterize the formability of metal sheets. The numerically predicted drawability of metal sheet is in good agreement with the experimental results in terms of strokes, sheet thinning and fracture failure location. The effects of sheet original thickness and friction coefficient between punch and sheet on the drawability of metal sheet were further investigated in detail.
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